<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>合并单元格</title>
</head>
<body>
<!-- 跨行合并：rowspan 跨行合并
跨列合并：colspan 跨列合并
1.先确认是跨行排列还是跨列排列
2.找到目标元格  
3.核心代码写到这个单元格上面
4.删掉多余的表格

-->
<table border="1" cellspacing = "0" width ="500" height = "249" align="center">
  <tr>
    <td></td>
    <td colspan="2"></td>

  </tr>

  <tr>
    <td rowspan="2"></td>
    <td></td>
    <td></td>
  </tr>

  <tr>

    <td></td>
    <td></td>
  </tr>
</table>
</body>
</html>